Sonsona (20-1-1, 15 KOs) also told that his contract with his handler will expire in 2017.

It was Gello-ani that guided the then 19-year-old Sonsona to become Philippines’ youngest boxing champion when Sonsona captured the super flyweight world title back in 2010 in Canada.

After an early success in the sport of boxing, Sosona’s career stalled after salvaging a draw against Alejandro Hernandez in his first title defense.

Wilfredo Vazquez Jr. also stopped, the then undefeated, Sonsona in Round 4, when the Gensan native moved up in weight for the title fight at super bantamweight in 2010 — which was his only fight that year.

Sonsona came back in October 2011 — his only fight also in that year — and registered a decision victory over Juan Carlos Jacobo.

Since his first defeat, Sonsona registered six consecutive victories, avenging his loss to Vazquez in a rematch and sensational one-punch knockout win over Akifumi Shimoda.

Sonsona’s career seemed in the right track until this supposed to be step-up fight with Russell was cancelled due to a seemingly unprofessional behavior.